Safety-chain for doors.



No. 807,779. PATENTED DEC. 19, 1905. C. D. RINALD.

SAFETY CHAIN FOR DOORS.

APPLIGATION FILED AUG.a,19o5.

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einnEN'r D. RiNALD, "0F PHiLADNLPHA, 'PNNNS'YLVNNlN SAFETY-CHAIN FORDOORS.

Nascar/79.

To all whom t may concern:

Be it known that I, CLEMENT D. RINALD, a citizen of the United States,residing in Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented certain new and useful Improvements inSafety-Chains for Doors, of which the following is a specification.

This invention relates to safety-chains for doors-viz., chains designedto permit only the partial opening of the doors to which they areapplied after said doors have been unlocked in order to prevent theentrance of undesirable persons.

The object of the invention is to provide improved means whereby thesafety-chain maybe released from the outside by means of a key, `s`othat the occupants of the house may gain access to the same when suchchain is in use.

Vith this end in view the invention consists in the novel features,arrangements, and combinations of parts to be hereinafter described andclaimed.

In the accompanying drawings, Figure l represents a front elevation of adoor with my improved safety-chain shown in position thereon. Fig. 2 isan outside elevation of that part of the door where the lock andsafety-chain are applied. Fig. 3 is a vertical vtransverse section online 3 3, Fig. 1, drawn on a larger scale; andFig. 4 is atightly-closing front view showing the safety-chain in use for the door.

Similar letters of reference indicate corresponding parts in thedifferent figures of the drawings.

Referring to the drawings, A represents a door, B the door-frame of thesame, and C a safety-chain which is attached at one end to a stationarystaple C on the j amb of the doorframe in about the same position as theordinary safety-chains. The opposite end of the chain C is provided witha snap-hook C2, which is attached when the chain is used to theinteriorly-disposed downwardly-pivoted shackle D of a lock D, which isset in a mortise extending through the door. The shackle D is disposedat the inner end of the lock and `at right angles to the door, as shown,while the keyhole is located at the outer end of the lock, and iscovered by an escutcheon D2. When the safety-chain is used in theordinary manner, the snap-hook C2 is inserted into the closed shackle Dof the door, so as to permit thereby the partial opening of theSpecification of Letters Patent.

77,4/ Application led August 8, 1905.

Patented Dec. 19, 1905.

Serial No. 273,274.

door to see who desires admission from the outside. When the door is tobe opened, the snap-hook is released from the shackle. In case any oneliving in the house desires to come in from the outside at any timeduring the day or night and nds on opening the door with his regular keythat the safetychain C is applied to the shackle D so a: to lock thedoor he inserts an auxiliary key D3 into the lock D from the outside andwithdraws the latch e of the lock from the recessed end of the shackleD. A spring e acting on the heel f2 of the shackle will then immediatelyopen the latter and hold it in the raised position, (shown in dottedlines in Fig. 3,) so that the snap-hook with the chain slips olf ofitself and drops from the shackle into a pendent position along the ambof the door, so as to permit the opening of the same. When thesafety-chain is desired to be placed in position for locking the door,the snap-hook is slipped over the shackle D', and the latter is thenclosed or the same D is pressed back into locked position and thesnap-hook connected thereto in the usual manner.

To one of the links of the chain, about equal to the distance of thekeeper C from the shackle D, is applied asmall ring or snaphook (Z,which can be inserted directly onto the snap-hook C or the shackle D',so that the chain C when thus applied fits taut across the door from thekeeper to the bail, takes up the slaclgof the chain, and holds the doorclosed, so that it cannot be opened even for an inch or so. Thesafety-chain serves then also as a locking device for the door and canonly be opened and detached by the special key made for releasing theshackle. regularlock and key can therebybe dispensed with and the doorbe locked by the chain and opened by releasing the shackle by the keyfrom the outside or by detaching it from the shackle from the inside. Insome cases, such as rear doors, this safety arrangement would besu'liicient for locking and unlocking the door, so that the expensivedoor-lock could be dispensed with.

Having thus described my inventionflclaim as new and desire to secure byLetters Patentl. The combination, with a door anddoorframe, of asafety-chain attached at one end to the latter, and aneXteriorly-operable lock embodying an interiorly-disposed shackle overwhich the opposite end of said chain is fitted.

The

Q sezwe i 2. In a device such as described, the 00m- In testimony that Iclaim the {Greg-Omoas blnatlon, With a safety-chain attached t0 the myinvention I have sign'edmmy mam) in d0or-frame, of anexteriorly-operable lock presence of tWo subscribing with@ sses.mortised in the door and embodying an intel 7. 5 riorly-disposeddownwardly-pivoted shackle CLEMENT D- RLY- LiiU. K i over Which saidchain is fitted, said look also Witnesses: Y g v i embodying self-actingmeans for raising said GEO. R. VAN ZANDT,

shackle When the same is released. CHARLES H. HABEL.

